HighGHSA-gr2m-v5gq-v685CVE-2026-102674

Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions

Published 29 Sept 2026 · Updated 29 Sept 2026

Affected packages

electronnpm

Affected: <41.10.6
Fixed in: 41.10.6

Update to the fixed version for your release line, for example:npm install electron@41.10.6

electronnpm

Affected: >=42.0.0-alpha.1 <42.9.2
Fixed in: 42.9.2

Update to the fixed version for your release line, for example:npm install electron@42.9.2

electronnpm

Affected: >=43.0.0-alpha.1 <43.4.1
Fixed in: 43.4.1

Update to the fixed version for your release line, for example:npm install electron@43.4.1

electronnpm

Affected: >=44.0.0-alpha.1 <44.0.0-beta.5
Fixed in: 44.0.0-beta.5

Update to the fixed version for your release line, for example:npm install electron@44.0.0-beta.5

Details

Impact

Windows opened from a sandboxed top-level document did not inherit that document's HTML sandbox restrictions, so content that was meant to run sandboxed could open a window with the app's full origin. GHSA-hq2x-r82h-9wj4 covers the same issue for sandboxed iframes.

Apps are only affected if they render untrusted content in a sandboxed top-level document that allows popups. Apps that deny popups from untrusted content with setWindowOpenHandler are not affected.

Workarounds

Return { action: 'deny' } from setWindowOpenHandler for windows opened by untrusted content.

Fixed Versions

44.0.0-beta.5
43.4.1
42.9.2
41.10.6

For more information

If you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.